@Fran-Diox Yes, it would be great if OnsenUI is made fully compatible with Polymer. After all, Polymer is a very good fit for the web components style that OnsenUI uses. Even better, would be Polymer versions of all the components. I did see a blog post about this on your site somewhere but don’t know whether it is something you are planning in the future?

@coolman monaca preview is for development and loads everything in memory for faster debugging. If you want to test your app in real devices I’d recommend you using Monaca Debugger (and just run monaca debug in the CLI). That will put all the transpiled files in the device and refresh the app whenever you modify your code. Otherwise, just run monaca transpile to perform an actual transpilation of your coed and generate files.

@lapisanlangit As it was already mentioned, the kitchen sink is already updated. And it’s on Github.
most of tutorial in documentation using reactjs
I think the tutorial app has exactly the same examples in React and in Angular 2.

@sj.meyer No. It does not force you to use promises. Also, to add Onsen to an existing project, use the download tab of this document: https://onsen.io/getting-started/
If you use NPM or Bower, you can also use those.